China’s overseas shipments rose from a year earlier, narrowly missing estimates, the latest sign that Asian trade is holding up on robust external demand and a brighter global outlook. Exports increased 8.1% in September, the customs administration said Friday, less than the 10% projected in a Bloomberg survey. Imports rose 18.7% , exceeding estimates with the fastest growth since March, to result in a trade surplus of $28.5 billion. Trade surplus versus the US rose to a record $28.1 billion. Demand for Chinese products has proven robust as growth in major trading partners holds up, though this trade report also gets a boost from a comparison with a low base last year. The official factory gauge rose to a five-year high in September, and the International Monetary Fund this week raised its global growth forecast as well as its estimate for China.